Vacuum Cleaner
A vacuum cleaner (also known as “vac”, “vacuum” or “hoover” in colloquial British English and a “sweeper” in eastern US dialects such as Pittsburgh English) is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors. The dirt is collected by either a dustbag or a cyclone for later disposal._________A vacuum’s suction is caused by a difference in air pressure. An electric fan reduces the pressure inside the machine. Atmospheric pressure then pushes the air through the carpet and into the nozzle, and so the dust is literally pushed into the bag._________Tests have shown that vacuuming can kill 100% of young fleas and 96% of adult fleas. A British inventor has developed a new cleaning technology known as Air Recycling Technology which instead of using a vacuum uses an air stream to collect dust from the carpet._________This technology was tested by the Market Transformation Programme (MTP) and shown to be more energy efficient than the vacuum method. Although working prototypes exist Air Recycling Technology is not currently used in any production cleaner._________
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